Ore-concentrator.



H. J. DYKES.

ORE CONGENTRATOR.

APPLICATION IILED 17110.17, 190a.

Patented Mar. 29, 1910.

3 SHEETS-SHEET 1.

ANDREW B. GRAHAM 00.. FHOTO-LJHOGRAPHERS. WASHINGTON 0.1;

H. J. DYKES.

ORE GONOENTRATOR,

APPLICATION FILED DEG.11,1908

Patented Mar. 29, 1910.

3 SHEETS-SHEET 2 $4441 who's ANDREW a GRAHAM G0. PHOTO-UWDGRAPHERS WASHINGY H. J. DYKES..

ORE OONGENTRATOR.

APPLIGATION FILED DEO.17, 190s.

Patented Mar.29,1910.

3 SHEETS-SHEET 3.

wi/bvwoo'ao alien m3 c0 PHUTKLUTNOGRAFRERS. wAsmNsToN u u HUGH J. DYKES, OF SALT LAKE CITY, UTAH.

ORE-GONGENTBATOR.

Specification of Letters Patent.

Patented Mar. 2%, 1910.

Application filed December 17, 1908. Serial No. 468,048.

To all whom it may concern:

Be it known that I, HUGH J. DYKES, a citizen of the United States, residing at Salt Lake City, in the county of Salt Lake and State of Utah, have invented a new and useful Ore-Concentrator, of which the following is a specification.

My invention relates to ore concentrators of that class into which the material in the form of pulp and slime is distributed upon an inclined pan or table and caused to move thereon so that the heavier metallic portions of the mass being treated shall pass upward, while the slime and lighter particles shall pass downward and out at the lower end of the table.

My invention has for its primary object the provision of a concentrating table having three motions, namely, a longitudinal jolting or concussive movement, a lateral. rocking movement and a lateral reciprocation or tail shake at its lower or tail end. In this connection also I provide for an adjustment of the longitudinal inclination of the pan and for a regulation of the extent of lateral tail shake, as well as for a regulation of the extent of the rocking movement.

The invention consists in the arrangement of parts and details of construction now to be described and specifically pointed out in the appended claims.

In the drawings, Figure 1 is a plan view of my concentrating table; Fig. 2 is a side elevation of Fig. 1, the upper portion thereof being broken away and the longitudinal reciprocating mechanism being in section; Fig. 3 is a transverse section on the line 33 of Fig. 1; Fig. 4 is a transverse section on the line 4tl of Fig. 1; Fig. 5 is an enlarged detail of one of the buffers for the concentrating table; Fig. 6 is an enlarged detail elevation of the adjustable crank throw used for giving a rocking movement to the table; Fig. 7 is a face view of the crank pin guideway detached; Fig. 8 is a top view of the tail shake mechanism; Fig. 9 is an enlarged longitudinal fragmentary section of the parts shown in Fig. 4; Fig. 10 is a fragmentary detail section of the tail supporting head; Fig. 11 is a detail view of the adjusting rack for the part shown in Fig. 8; Fig. 12 is an enlarged longitudinal section of the front end of the table showing the mechanism for reciprocating or jolting the same; Fig. 13 is an enlarged detail in section of the parts shown in Fig. 7; and Fig. 1 1 is a fragmentary section of Fig. 13 on the line 1414l.

In the drawings 2 represents a concentrating table of any proper material, having a flat bottom surface, opposed upstanding side walls, and an upstanding rear wall, these walls being formed by angle irons designated respectively 3 and t, bolted to the margin of the material forming the bottom of the table. .Vhile the table in plan is not necessarily of the form shown in Fig. 1, I have found by experience that this peculiar form is best for the purpose. As may be seen from Fig. 1, the table is relatively contracted at its opposite ends and bulged or widened at its middlethe tail of the table being narrower than its head. This table is supported at an inclination from head to tail. The supporting devices will be later described, but it may be stated now that they are such as to permit of alongitudinal move ment of the table, of a rocking movement and of a lateral reciprocatory movement. The table on its under side is braced by angle irons 5, which extend from end to end along the length of the table on both sides of the center thereof, and by diagonal angle irons, 6. While the table is preferably braced as shown, it will be obvious that any other arrangement of braces may be equally well adopted and that the braces do not affect the operating mechanism.

The table is supported upon a base, '7, preferably formed of longitudinal beams, and at the head of the table is supported the two pairs of vertical posts 8 and 9, which are braced and connected rigidly together in any desired manner, as by the transverse bracing beams, 10, 11, and by the bolts, 12, 13. It will be noted from Fig. 7 that the bolts 12 project from the posts-for a purpose to be hereafter described.

In order to give a longitudinal or olting movement to the table, the following mechanism is provided, reference being had to Figs. 2 and 12: 15 designates a shaft actuated in any desired manner, as by the belt wheel, 16, which shaft carries upon it the eccentric or cam, 17. Mounted to slide longitudinally in the beam 11 is the bar 18 carrying at its end a yoke, 19, supporting within it the head 20, of any suitable material, having a concaved surface adapted to contact with the face of the eccentric wheel, 17. The other endof the bar 18 passes through a transverse beam 21 mounted on the post 9 and has formed at its end the enlarged rounded head 22. This head is inclosed within a casing formed by opposed sections, 23, 24 bolted together by bolts. The upper section 23 is socketed to receive the upper half of the ball-like head, 22, and the lower section 23 is also socketed to receive the lower half of this head and the upper rounded head 26 of a standard 27, whose lower end carries a ball 26 supported in a yoke 25 on the beam 7 The lower face of the ball 22 is formed with a hemispherical socket to receive the ball 26 and allow the same to rock thereon in the manner of a universal joint. It will be seen from Fig. 12 that when the ball 26 is placed in the socket in the head 22 and both of these spherical elements are held together by the sections 23, 25, that a ball and socket or universal joint is formed between the supporting piece 27 and the head 22.

In order to force the head 20 to contact with the face of the cam 17 and thus retract the table 2, I provide the spring 28 which surrounds the spindle or bar 18 and bears at one end against the beam 21, while at its other end it bears against a disk 29, screw threaded on the spindle 18. By rotating the disk 29 up or down on the spindle 18, the compression of the spring and, therefore, the force with which it will retract the table, may be easily regulated. It will be obvious now that as the cam 17 is rotated, the spindle 18 will be forced forward, carrying with it the sections 23, 24, and the table mounted thereon, and that as the cam continues to turn into the position shown in Fig. 12, the spring 28 will force the spindle backward, retracting the table until the sections 23, 24, strike against the beam 21, or the disk 29 strikes against the beam 11, or, preferably, until the rear end of the table or its supporting frame strikes against buffers mounted upon the posts 9.

In Fig. 5 I have shown a detail view of these buffers which are mounted on the ends of the bolts 12. 30 designates these buffers, which are socketed to receive the ends of the bolts 12 and held in place on the bolts by nuts 31, these nuts preventing the buffers contacting with the clamping nuts on the bolts 12. The bufl'ers may, of course, be made of any suitable material, such as leather, rubber or any other sufficiently yielding substance which will act to take up the jar of the table as it springs backward under the impulse of the spring 28. It will be seen that every time the table springs backward and contacts with the buffers, 30, a jar or jolt will be transmitted to it and to the mass of ore upon the table, this jar or jolt acting to cause the heavy or metallic particles to well as an axial reciprocatory motion, it

will be seen that the universal joint is practically the only form of joint which could be used for this. In order to give a lateral rocking motion to the table, I provide at the middle of the table, a transverse shaft 33 shown clearly in Fig. 3, this shaft being journaled on a transverse supporting beam 34 mounted on the longitudinal base beams 7. This shaft carries upon it a sprocket wheel, 35, which is driven by a sprocket chain 36, from a sprocket wheel 37 mounted on the shaft 15. On the outer end of the shaft 33 I provide a crank arm or crank head such. as shown in detail in Figs. 6, 7 13 and 14. This head 38 as shown in Fig. 13 is longitudinally recessed as at 39 and is thereby formed with two outwardly projecting side walls forming guides. Shiftable within the guides is a sliding block, 40, from which projects a crank pin 41. The block 40 is held within the recess 39 by plates 42, which are adapted to be screwed or in any other desired manner fastened to the head 38 and project over the block 40, as shown in Fig. 14. Swiveled in the end of the block 40 is an adjusting screw 42. This is accomplished by recessing the end of the block 40 and inserting therein the headed end 43 of the screw 42. A plate 44 having a central opening smaller than the head 43 is then attached to the end of the block 40 as by the screws 45, thus holding the screw 42 in swiveled engagement with the block 40. The screw 42 is screw-threaded and has upon it a binding nut 46. It will be obvious from Figs. 13 and 14 that upon a rotation of the nut, 46, the screw 42 will be forced inwardly or outwardly, carrying with it the head 40 and that thus the crank pin 41 will be adjusted into more and being formed at opposite ends with bearings 51 51, for the pins 47, 41.

It will be obvious that upon a rotation of the shaft 33, by the sprocket chain 36, the crank head 38 will be rotated and that the crank pin 41 through the connecting rods 48, 49, will give a vertical oscillating move ment to one side of the table, 2, thus causing the table to rock laterally to an extent depending upon the throw of the crank pin ll. This throw is, as before described, determined by the amount of eccentricity between the crank pin 11 and the shaft 33. By turning the screw 42 the amount of throw may be easily regulated to any extent desired.

In order to give a lateral reciprocation to the tail end of the table I provide the mechanism shown in detail in Figs. 4, 8 and 9. 50 designates a. transverse supporting beam mounted on the base beams, 7, the upper face of this beam being provided with a base plate 50. 52 designates a bell crank lever which is pivotally mounted upon the beam 50 and is connected at one end by a connecting rod 53 to a crank pin 54 projecting from a crank disk 55 on the end of the shaft 33. The other end of the bell crank lever 52 is slotted as at 56 and passes through a yoke 57 formed on a bar 58. A pin 59 passes downward through the yoke and through the slot 56 of the bell crank. The other end of the bar 58 carries a head 60 formed with a hemispherical socket 67 on its upper face and with a series of sockets on its lower face adapted to contain anti-friction balls, 61, which contact with the wear plate 50. By mounting the head 60 in this manner, it is free to move back and forth with the table during its longitudinal movement and to be moved by the bell crank lever for producing the lateral oscillatory movement of the lower end of the table. The other end of the bar 58 beyond the yoke 57 is formed with an ear 62, in which is pivoted an adjusting handle 63 having a rib 64k on its lower face adapted to engage with radiating teeth in a rack bar 65. As shown in Fig. 11, the rack bar 65 is formed with a bracket 66 adapted to be attached by bolts to the end of the transverse support, 50. It will be obvious that by moving the handle 63 in one direction or the other that the bar 58 will be turned upon its pivotal point, that is, the socket 67, and that the pin 59 will travel by moving in the slot 56, and that, inasmuch as this brings the point of engagement between the bell crank 52 and the bar 58 nearer to or farther from the pivotal point of the bell crank, that the lateral throw of the bar' 58 will be changed. The nearer the pin 59 is to the pivotal point of the bell crank, the shorter will be the throw of the bar 58, and vice versa. There is thus provided a means of regulating the extent of the lateral reciprocation of the table.

Carried within the socket 67 is the ball 68 carried upon the end of a vertical screw threaded adjusting rod 69 which passes upward through the bottom of the table, as shown in Fig. 4, and is engaged with a screw threaded sleeve 7 0 fastened by bolts to the table. The upper end of the rod 69 is provided with a hand wheel 71, whereby the rod may be turned, and with a lock nut 7 2 which holds the rod 69 in any adjusted po-f not wish to be limited to this, as, of course,

other means may be used for driving these shafts and for causing the proper oscillation of the table It will be seen that a universal joint formed by the ball and socket engagement between the ball 68 and the head 60, and the ball and socket engagement between the ball 22 and the ball 26, permits the table while supported on its axial line to oscillate in any direction desired, the ball and socket 22, 26, acting as a pivot for the lateral reciprocation of the table while the balls and sockets 68, 60 and 22, 23, permit of the rocking movement of the table. The mechanism I have described therefore provides for a longitudinal jolting movement of the table, a lateral rocking movement which causes the slime and liquid upon the table to move backward and forward across the same and also pro-vides for a shaking movement which dislodges the smaller par ticles and slime and carries the same over the tail of the table. The whole action of my mechanism is to more thoroughly concentrate the ore and more thoroughly distribute it over the whole table surface while being concentrated, thus disintegrating the ore pulp, causing the heavier particles to separate from the lighter, and also causing the heavier particles to ascend the table, while the lighter particles are carried downward and out from the table thereof.

While I have shown what I believe to be the preferred details of construction, I do not wish to be limited thereto, as it is obvious that these may be varied in many ways and yet secure the objects of my invention.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art with out further description, and it will be un derstood that various changes in the size, shape, proportions and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having thus described my invention, what I claim as new and desire to secure by Letters-Patent, is:

1. In an ore concentrator, the combination with a. table mounted to have simultaneous longitudinal, lateral oscillatory and rocking movement, of a single supporting element at one end of the table and movable therewith during the longitudinal and rocking movement of the table, and means for bodily moving the element for producing the lateral oscillatory movement of the table.

2. In an ore concentrator, the combination with a table mounted to have simultaneous longitudinal, lateral oscillatory and rocking movement, of a single supporting element at one end of the table and movable therewith during the longitudinal and rocking movement of the table, means for bodily moving the element for producing the lateral oscillatory movement of the table, and means for adjustably connecting the element with the table for changing the inclination of the latter.

3. In an -ore concentrator, the combination with a table mounted to have simultaneous longitudinal, lateral oscillatory and rocking movement, of a single supporting element at one end of the table and movable therewith during the longitudinal and rocking movement of the table, means for bodily moving the element for producing the lateral oscillatory movement of the table, a screw thread on the said element engaging the table, means on one end of the element for manually turning the same, and a ball and socket joint between the lower end of the element and firstanentioned means.

4. In an ore concentrator, the combination with a movable concentrating table, an upright screw extending through the table and forming the sole supporting means for one end of the latter, a device 011 the upper end of the screw for turning the same, a bearing element under the table and freely moved in different directions, a connection between the element and screw for permitting the latter to tilt and movable bodily in different directions with the said element, and means for moving the bearing element for actuating the table.

5. In an ore concentrator, the combination with a movable concentrating table, an upright screw extending through the table and forming the sole supporting means for one end of the latter, a device on the upper end of the screw for turning the same, a bearing element under the table and freely movable in different directions, a connection between the element and screw for permitting the latter to tilt and movable bodily in different directions with the said element, and mech anism connected with the element for actuating the same for moving the table.

6. In an ore concentrator, the combination with a table, means connected with the side of the table for rocking the latter on an axis approximately parallel with the direction of flow of the liquid over the table, means connected with one end of the table for giving it a lateral reciprocation in a horizontal plane, and means connected with the other end of the table for reciprocating the same longitudinally, of supports along the axial line of the table adapted to rock laterally and to move laterally in a horizontal plane.

7. In an ore concentrator, the combination with a flat imperforate inclined table enlarged transversely at its middle and having an upstanding rim extending around the edge thereof except at the lower or tail end of the table, means for laterally rocking the table, means for giving it a lateral reciprocation in a horizontal plane, means for longitudinally reciprocating the table, and separate driving mechanisms independently connected with the said means, of supports along the axial line of the table adapted to rock laterally and move longitudinally and transversely with the table.

8. In an ore concentrator, a concentrating table pivoted at one end on a universal joint, means for rocking said table to dip alternately at opposite sides, means for moving the table longitudinally during the dipping thereof, and means for reciprocating the free end of the table in transversely a horizontal plane.

9. In an ore concentrator, a table supported on a universal joint located centrally at one end and having a laterally-movable support secured thereto in fixed angular relation at the other end, of means for longitudinally reciprocating the table, and a support carrying means for laterally reciprocating said support to swing the table horizontally about the said universal joint as a center and also permitting the support to move with the table during its longitudinal reciprocation.

10. In an ore concentrator, the combination with a table pivotally supported on a universal joint at one end and carried on a laterally-movable support at the other, both of said supports being located along the median line of the table, of means for longitudinally reciprocating the table, meansfor rocking the table to cause opposite sides thereof to rise and fall, and means for laterally reciprocating the free end of the table.

11. In an ore concentrator, a table, a bed plate, a member freely movable in all threetions on the bed plate and having a socket, a ball carried rotatably in the socket and supporting the table, means for reclproeating and rocking the table simultaneously, and'means for moving the said member for imparting a back and forth lateral movement to the table.

12. In an ore concentrator, a table, a bed plate, a member freely movable in all directions on the bed plate and having a socket, anti-friction balls between the member and the bed plate, a ball carried movably in the socket, a supporting bar projecting from the ball and engaging with the table, and means for reciprocating and rocking the table.

13. In an ore concentrator, a table, a ball supporting one end of said table at its middle, a bed plate beneath the other end of said table, a member freely movable in all directions on the bed plate and having a socket, a ball carried in the socket and supporting the said other end of the table, and means for reciprocating and rocking the table.

14. In an ore concentrator, a table, a longitudinally movable ball supporting the upper end of the table at its middle, a ball supporting the lower end of the table, a head in which the ball is movably carried,

means for laterally reciprocating the head to laterally reciprocate the lower end of the table, means for longitudinally reciprocating the table from its upper end, and means for laterally rocking the table.

15. In an ore concentrator, a table pivotally supported at its upper end, a leg projecting below the other end of the table and provided with a ball at its end, a head having a socket adapted to receive said ball, a plate for supporting the head, an arm projecting from the head, a bell crank engaging with said arm, and means for operating the bell crank to laterally reciprocate the head and the table carried thereby.

16. In an ore concentrator, a table pivotally mounted at its upper end, and a leg depending from the tableat its free end and carrying a ball, a head provided with a socket for the ball, a bed plate upon which the head is freely movable, an arm projecting from the head, a slotted bell crank, a pin on said arm engaging with the slot of the bell crank, means for reciprocating the bell crank, and means for adjusting the position of the arm nearer to or farther from the pivot of the bell crank to regulate the amount of lateral motion of the arm, head and table.

17. In an ore concentrator, a table pivotally mounted at its upper end and having its lower end free for lateral reciprocation, a leg extending below said table and having a spherical end, a head having a socket in which the ball is supported, a plate on which the head is freely movable in all. directions, an arm projecting from the head having a yoke, a bell crank, one arm of which extends through the yoke, said'arm being slotted, a

pin extending through the yoke, and through the slot of the bell crank, a rack fixedly mounted in line with the arm extending from the head, and a handle pivoted to the arm and adapted to move the same in the 'slot of the bell crank nearer to or farther from the pivotal point thereof, said arm having a rib adapted to engage with any one of the teeth on said rack to adjust the throw of the arm, head and table.

18; In an ore concentrator, the combination of a movable table, a tiltable and bodily movable supporting element at one end thereof, a bearing member carrying the element, a bell crank lever operatively connected with the member for moving the same, an actuator for the lever, means for changing the effective throw of the lever with respect to the member to regulate the extent of movement of the table, and a mechanism for rocking the table.

19. In an ore concentrator, the combination of a movable concentrating table, a tiltable supporting element disposed under one end of the table and having a jointed connection with the latter, a second supporting element rigidly secured to the opposite end of the table, a bearing member on which the second element is tiltably mounted, and operating means connected with the bearing member for moving the same to operate through the second element to actuate the table.

20. In an ore concentrator, the combination of a table, a supporting element arranged centrally of the table at the upper end thereof, a fixed bearing for the lower end of the element and 011 which the latter is free to tilt, a flexible joint between the upper end of the element and table, a ver tically-disposed screw connected with the lower end of the table to form a support therefor and means for changing the inclination of the table, a bearing member, a flexible joint between the member and screw for permitting the latter to tilt with the table and whereby the said bearing member is moved by the table, and operating means connected with the last-mentioned bearing member for moving the same whereby the said screw is shifted to actuate the table.

21. In an ore concentrator, a table mounted for longitudinal and lateral movement in the same plane, a rod supported in bearings having a head at one end, a rotatable eccentric disk engaging with the head, a

spring forcing the rod against the eccentric disk, a ball formed on the end of said rod and having a socket in its lower face, said table having a socket in which said ball is carried, a bed plate having a socket formed therein, a tiltable element having at one end a ball engaging with the bed plate socket and having at its upper end a ball engaging with the socket formed in the ball carried by said rod, and means for giving the table a lateral reciprocation simultaneously with the rotation of said eccentric disk.

22. In an ore concentrator, a table mounted to shift longitudinally, a bed plate, a ball and socket joint between said bed plate and the middle of the upper end of the table, means for longitudinally reciprocating the table, means for laterally reciprocating the lower end of the table, means for rocking the table, and a mechanism separately connected with the said several means for simultaneous operation.

23. In an ore concentrator, a table, a bed plate beneath the lower end of the table, a head adapted to move in any direction over the bed plate and having a socket in its upper face, a ball carried by the lower end of the table at its median line and supported in said socket, a bed plate beneath the upper end of the table, a ball and socket joint supporting the upper end of the table upon the bed plate and allowing the table to move thereon universally, and means for longitudinally reciprocating the table, rocking it and laterally reciprocating it.

24. In an ore concentrator, a table, a head at the lower end of the table beneath the same, means for laterally reciprocating the head, a ball and socket joint between the head and the table, a rod supported to slide in bearings at the upper end of the table, a rotatable eccentric disk engaging with the rod, a spring forcing the rod against the eccentric disk, a ball formed on the end of said rod and having a socket in its lower face, a sectional casing attached to the upper end of the table at its median line and engaging said ball, a bed plate having a socket formed on its upper face, a leg having a ball at its lower end supported in said socket for universal movement and a ball at its upper end supported in the socket formed on the ball attached to said rod, means for giving the head at the lower end of the table a lateral reciprocation simultaneously with the rotation of said eccentric disk, and means for rocking the table transversely simultaneously with its longitudinal movement.

25. In an ore concentrator, the combination of a table pivotally mounted at one end, means for imparting a longitudinal reciprocatory movement to the table, means for rocking the table on an axis parallel with the longitudinal movement, a single element supporting the opposite end of the table and bodily movable with the latter during its longitudinal movement and tiltable with the table during its rocking movement, and a device operatively connected with the element and operating through the same to impart a horizontal swinging movement of the table about its pivoted end, said device including means for adjusting the range of the swinging movement.

26. In an ore concentrator, the combina tion of a movably mounted table, a depend ing supporting element on one end thereof and mounted to tilt on its lower end, an oscillatory member operatively related to the said element for moving the latter and table, and an adjustable pivotal connection between the element and member to regulate the movement of the former independently of the latter.

27. In an orc concentrator, the combination of a table pivotally mounted at one end for longitudinal, rocking and oscillatory movements, a supporting screw at the opposite end for changing the inclination of the table, means for bodily moving the screw to oscillate the table, and actuating mechanism connected with the screw for moving the same, said mechanism including means for adjusting the range of movement of the screw.

28. In an ore concentrator, a table, mechanism for longitudinally reciprocating a table, mechanism for laterally reciprocating the table, mechanism for rocking the table,

said mechanisms being separately connected,

with the table, and a screw secured to the table in fixed angular relation and forming the sole support for the table at one end, said screw constituting means for vertically adjusting the lower-end of the table to ad just the inclination thereof.

29. In an ore concentrator, an inclined table, a longitudinally movable ball and socket joint supporting the upper end of the table, means for longitudinally reciprocating the table, a socket supported below the lower end of the table, a screw rod passing through the lower end of the table and having a threaded engagement therewith, a ball on the lower end of the screw engaging in said socket, and means above the table for turning the screw rod to elevate the lower end of the table and adjust the inclination thereof.

30. In an ore concentrator, a table, mechanism for giving a longitudinal reciprocation to the table, a transverse shaft carrying at its end means for giving a rocking motion to the table upon a rotation of the shaft, means connecting the said shaft with the longitudinally reciprocating mechanism, a single element connected with and forming the sole support for the table at one end and bodily movable with the table in different directions, and means connected to said shaft and the said element for laterally reciprocating the lower end of the table.

31. In an ore concentrator, a table, mechanism for longitudinally reciprocating the table, a transverse shaft driven from said longitudinal reciprocating mechanism and carrying at its end a crank, means for connecting the crank with the edge of the table for rocking the same, a bell crank mount-ed adjacent to the lower end of the table, an upright tiltable clement operatively connected with the bell crank and the lower end of the table, and bodily movable therewith, and rigidly connected with means for reciprocating the bell crank by the rotation of the transverse shaft.

32. In an ore concentrator, a table having an upstanding rim, said table being contracted at its ends and laterally enlarged at its middle, in combination with means for longitudinally reciprocating the table and connected with one end thereof, means connected with the opposite end of the table for oscillating the same in a horizontal plane, and means connected with the side of the table for rocking the same.

33. In an ore concentrator, an inclined table provided with a flat upper surface and having its middle portion gradually widened from both ends toward the center, an upstanding rim extending along the longitudinal edges and conforming to the shape thereof and across the upper or head end of the table, said table being imperforate and having its lower end contracted into a tail through which the water flows off the table, in combination with a pivot bearing at the upper end of the table, a device at the lower end of the table to cooperate with the bearing for supporting the latter and laterally swinging the table in a horizontal plane about the pivot bearing as a center, and means connected with the table for rocking the same on a central axis extending longitudinally of the table.

34:. In an ore concentrator, an inclined table fiat throughout its area and having an upstanding rim at its side and upper edges only, said table being contracted at its upper and lower ends, in combination with means for longitudinally and laterally reciprocating the table, and means for rocking the table.

35. In an ore concentrator, a table having an upstanding rim, the upper and lower ends of the table being contracted, and the middle portion thereof enlarged, a pivotal mounting for the upper end of the table allowing the lower end to have free lateral reciprocation, means for longitudinally reciprocating said mounting to give a longitudinal reciprocation to the table, a supporting element for the lower end of the table movable bodily with the same during its longitudinal movement, means operating through the said element'for laterally reciprocating the lower end of the table simultaneously, and means for rocking the table simultaneously with its longitudinal and lateral reciprocations.

In testimony, that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

HUGH J. DYKES.

Witnesses:

PAULINE DYKns, E. F. DYKES. 

